Strong decay of Λ _c(2940) Λ c ( 2940 ) as a 2P state in the Λ _c Λ c family

2018/06/04 by Qi-Fang Lü, Li-Ye Xiao, Zuo-Yun Wang +1
Physics and Astronomy · #Branching fraction #Decay scheme #Nuclear physics research studies #Parity (physics) #Particle decay #Particle physics theoretical and experimental studies #Proton decay #Quantum Chromodynamics and Particle Interactions #State (computer science) #hep-ex #hep-ph #nucl-th

paper · pdf · doi:10.1140/epjc/s10052-018-6083-7

7 pages, 4 figures, 4 tables

arxiv created 2018/06/04 · openalex created_date 2018/06/13 · openalex publication_date 2018/07/01 · arxiv updated 2018/08/15 · openalex updated_date 2026/08/05

Abstract

Considering the mass, parity and D⁰ p decay mode, we tentatively assign the Λ _c(2940) as the P- wave states with one radial excitation. Then, via studying the strong decay behavior of the Λ _c(2940) within the ³P₀ model, we obtain that the total decay widths of the Λ _c1((1)/(2)^-,2P) and Λ _c1((3)/(2)^-,2P) states are 16.27 and 25.39 MeV, respectively. Compared with the experimental total width 27.7^+8.2_-6.0± 0.9^+5.2_-10.4~\mathrm MeV measured by LHCb Collaboration, both assignments are allowed, and the J^P=(3)/(2)^- assignment is more favorable. Other λ -mode Σ _c(2P) states are also investigated, which are most likely to be narrow states and have good potential to be observed in future experiments.

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